雖然氫分子在質量的基礎上具有非常高能量密度的，部分是因為其低分子量，氣

Although hydrogen molecules have a very high energy density on a mass basis, partly because of their low molecular weight, the gas has a very low energy density by volume under ambient conditions. If it is used as a fuel stored on the car, pure hydrogen must be pressurized or liquefied to provide sufficient driving range. Increase the gas pressure, increase the energy density in the volume, use a smaller, but not light container. Achieving higher pressure requires more use of external energy for power compression. Alternatively, liquid hydrogen or hydrogen slurry with higher volume energy density can also be used

雖然氫分子在質量的基礎上具有非常高能量密度的，部分是因為其低分子量，氣體在環境條件下從體積上它具有非常低的能量密度。如果它是被用來作為存儲在車上的燃料，純氫氣必須是加壓或液化，以提供足夠的驅動範圍。提高氣體壓力，提高了在體積上的能量密度，使用較小的，但不輕的容器罐。實現更高的壓力，需要更多地使用外部能源動力壓縮。或者，也可以使用較高的體積能量密度的液體氫或氫漿

Although hydrogen has a very high energy density on a mass basis, in part because of its low molecular weight, gas has a very low energy density in volume under environmental conditions. If it is to be used as a fuel stored in a car, pure hydrogen must be pressurized or liquefied to provide adequate driving range. Increase the gas pressure, increase the energy density in volume, use smaller but not light container. To achieve higher pressure, more external energy is needed for power compression. Alternatively, liquid hydrogen or hydrogen slurries with higher bulk energy density can be used<br>